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Critical Update for Red Hat Enterprise Linux 8: .NET 6.0 DoS and RCE Issue

red hat
Calendar Grey June 14, 2023
Dist Redhat Esm H88
Oracle introduces major updates for Java SE 17, featuring essential security patches and performance improvements now accessible for Oracle Linux 8.
An update for .NET 6.0 is now available for Red Hat Enterprise Linux 8

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Summary

.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.
New versions of .NET that address a security vulnerability are now available. The updated versions are .NET SDK 6.0.118 and .NET Runtime 6.0.18.
The following packages have been upgraded to a later upstream version: dotnet6.0 (6.0.118). (BZ#2212378)
Security Fix(es):
* dotnet: .NET Kestrel: Denial of Service processing X509 Certificates (CVE-2023-29331)
* dotnet: vulnerability exists in NuGet where a potential race condition can lead to a symlink attack (CVE-2023-29337)
* dotnet: Remote Code Execution - Source generators issue can lead to a crash due to unmanaged heap corruption (CVE-2023-33128)
* dotnet: Bypass restrictions when deserializing a DataSet or DataTable from XML (CVE-2023-24936)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Topics%20covered

Topics Covered

security advisory security update remote code execution DoS Red Hat Enterprise Linux XML deserialization dotnet 6.0

References

https://access.redhat.com/security/cve/CVE-2023-24936 https://access.redhat.com/security/cve/CVE-2023-29331 https://access.redhat.com/security/cve/CVE-2023-29337 https://access.redhat.com/security/cve/CVE-2023-33128 https://access.redhat.com/security/updates/classification#important

Package List

Red Hat Enterprise Linux AppStream (v. 8):
Source: dotnet6.0-6.0.118-1.el8_8.src.rpm
aarch64: aspnetcore-runtime-6.0-6.0.18-1.el8_8.aarch64.rpm aspnetcore-targeting-pack-6.0-6.0.18-1.el8_8.aarch64.rpm dotnet-apphost-pack-6.0-6.0.18-1.el8_8.aarch64.rpm dotnet-apphost-pack-6.0-debuginfo-6.0.18-1.el8_8.aarch64.rpm dotnet-hostfxr-6.0-6.0.18-1.el8_8.aarch64.rpm dotnet-hostfxr-6.0-debuginfo-6.0.18-1.el8_8.aarch64.rpm dotnet-runtime-6.0-6.0.18-1.el8_8.aarch64.rpm dotnet-runtime-6.0-debuginfo-6.0.18-1.el8_8.aarch64.rpm dotnet-sdk-6.0-6.0.118-1.el8_8.aarch64.rpm dotnet-sdk-6.0-debuginfo-6.0.118-1.el8_8.aarch64.rpm dotnet-targeting-pack-6.0-6.0.18-1.el8_8.aarch64.rpm dotnet-templates-6.0-6.0.118-1.el8_8.aarch64.rpm dotnet6.0-debuginfo-6.0.118-1.el8_8.aarch64.rpm dotnet6.0-debugsource-6.0.118-1.el8_8.aarch64.rpm
s390x: aspnetcore-runtime-6.0-6.0.18-1.el8_8.s390x.rpm aspnetcore-targeting-pack-6.0-6.0.18-1.el8_8.s390x.rpm dotnet-apphost-pack-6.0-6.0.18-1.el8_8.s390x.rpm dotnet-apphost-pack-6.0-debuginfo-6.0.18-1.el8_8.s390x.rpm dotnet-hostfxr-6.0-6.0.18-1.el8_8.s390x.rpm dotnet-hostfxr-6.0-debuginfo-6.0.18-1.el8_8.s390x.rpm dotnet-runtime-6.0-6.0.18-1.el8_8.s390x.rpm dotnet-runtime-6.0-debuginfo-6.0.18-1.el8_8.s390x.rpm dotnet-sdk-6.0-6.0.118-1.el8_8.s390x.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2023:3582-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2023:3582
Issue date: 2023-06-14

Topic

An update for .NET 6.0 is now available for Red Hat Enterprise Linux 8.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory security update remote code execution DoS Red Hat Enterprise Linux XML deserialization dotnet 6.0

Relevant Releases Architectures

Red Hat Enterprise Linux AppStream (v. 8) - aarch64, s390x, x86_64

Red Hat Enterprise Linux CRB (v. 8) - aarch64, s390x, x86_64

Bugs Fixed

2192438 - CVE-2023-24936 dotnet: Bypass restrictions when deserializing a DataSet or DataTable from XML

2212617 - CVE-2023-29331 dotnet: .NET Kestrel: Denial of Service processing X509 Certificates

2212618 - CVE-2023-33128 dotnet: Remote Code Execution - Source generators issue can lead to a crash due to unmanaged heap corruption

2213703 - CVE-2023-29337 dotnet: vulnerability exists in NuGet where a potential race condition can lead to a symlink attack

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